1
2
3
4
5
6
7
8
9
10
11
12
13
14
15
16
17
18
19
20
21
22
23
24
25
26
27
28
29
30
31
32
33
34
35
36
37
38
39
40
41
42
43
44
45
46
47
48
49
50
51
52
53
54
55
56
57
58
59
60
61
62
63
64
65
66
67
68
69
70
71
72
73
74
75
76
77
78
79
80
81
82
83
84
85
86
87
88
89
90
91
92
93
94
95
96
97
98
99
100
101
102
103
104
105
106
107
108
109
110
111
112
113
114
115
116
117
118
119
120
121
122
123
124
125
126
127
128
129
130
131
132
133
134
135
136
137
138
139
140
141
142
143
144
145
146
147
148
149
150
151
152
153
154
155
156
157
158
159
160
161
162
163
164
165
166
167
168
169
170
171
172
173
174
175
176
177
178
179
180
181
182
183
184
185
186
187
188
189
190
191
192
193
194
195
196
197
198
199
200
201
|
// Copyright 2018-2024 Google LLC
//
// Licensed under the Apache License, Version 2.0 (the "License");
// you may not use this file except in compliance with the License.
// You may obtain a copy of the License at
//
// http://www.apache.org/licenses/LICENSE-2.0
//
// Unless required by applicable law or agreed to in writing, software
// distributed under the License is distributed on an "AS IS" BASIS,
// WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied.
// See the License for the specific language governing permissions and
// limitations under the License.
//
////////////////////////////////////////////////////////////////////////////////
#ifndef WEBP_TESTS_FUZZER_FUZZ_UTILS_H_
#define WEBP_TESTS_FUZZER_FUZZ_UTILS_H_
#include <cstddef>
#include <cstdint>
#include <cstdlib>
#include <optional>
#include <string>
#include <string_view>
#include <utility>
#include <vector>
#include "./img_alpha.h"
#include "./img_grid.h"
#include "./img_peak.h"
#include "src/dsp/cpu.h"
#include "src/webp/encode.h"
#include "fuzztest/fuzztest.h"
namespace fuzz_utils {
//------------------------------------------------------------------------------
// Arbitrary limits to prevent OOM, timeout, or slow execution.
// The decoded image size, and for animations additionally the canvas size.
// Enabling some sanitizers slow down runtime significantly.
// Use a very low threshold in this case to avoid timeouts.
#if defined(__SANITIZE_ADDRESS__) // GCC
static const size_t kFuzzPxLimit = 1024 * 1024 / 10;
#elif !defined(__has_feature) // Clang
static const size_t kFuzzPxLimit = 1024 * 1024;
#elif __has_feature(address_sanitizer) || __has_feature(memory_sanitizer)
static const size_t kFuzzPxLimit = 1024 * 1024 / 18;
#else
static const size_t kFuzzPxLimit = 1024 * 1024;
#endif
// Demuxed or decoded animation frames.
static const int kFuzzFrameLimit = 3;
// Reads and sums (up to) 128 spread-out bytes.
static WEBP_INLINE uint8_t FuzzHash(const uint8_t* const data, size_t size) {
uint8_t value = 0;
size_t incr = size / 128;
if (!incr) incr = 1;
for (size_t i = 0; i < size; i += incr) value += data[i];
return value;
}
#ifdef __cplusplus
extern "C" VP8CPUInfo VP8GetCPUInfo;
#else
extern VP8CPUInfo VP8GetCPUInfo;
#endif
//------------------------------------------------------------------------------
constexpr const uint8_t* kImagesData[] = {kImgAlphaData, kImgGridData,
kImgPeakData};
constexpr size_t kNumSourceImages =
sizeof(kImagesData) / sizeof(kImagesData[0]);
WebPPicture GetSourcePicture(int image_index, bool use_argb);
static inline auto ArbitraryWebPConfig() {
return fuzztest::Map(
[](int lossless, int quality, int method, int image_hint, int segments,
int sns_strength, int filter_strength, int filter_sharpness,
int filter_type, int autofilter, int alpha_compression,
int alpha_filtering, int alpha_quality, int pass, int preprocessing,
int partitions, int partition_limit, int emulate_jpeg_size,
int thread_level, int low_memory, int near_lossless, int exact,
int use_delta_palette, int use_sharp_yuv) -> WebPConfig {
WebPConfig config;
if (!WebPConfigInit(&config)) abort();
config.lossless = lossless;
config.quality = quality;
config.method = method;
config.image_hint = (WebPImageHint)image_hint;
config.segments = segments;
config.sns_strength = sns_strength;
config.filter_strength = filter_strength;
config.filter_sharpness = filter_sharpness;
config.filter_type = filter_type;
config.autofilter = autofilter;
config.alpha_compression = alpha_compression;
config.alpha_filtering = alpha_filtering;
config.alpha_quality = alpha_quality;
config.pass = pass;
config.show_compressed = 1;
config.preprocessing = preprocessing;
config.partitions = partitions;
config.partition_limit = 10 * partition_limit;
config.emulate_jpeg_size = emulate_jpeg_size;
config.thread_level = thread_level;
config.low_memory = low_memory;
config.near_lossless = 20 * near_lossless;
config.exact = exact;
config.use_delta_palette = use_delta_palette;
config.use_sharp_yuv = use_sharp_yuv;
if (!WebPValidateConfig(&config)) abort();
return config;
},
/*lossless=*/fuzztest::InRange<int>(0, 1),
/*quality=*/fuzztest::InRange<int>(0, 100),
/*method=*/fuzztest::InRange<int>(0, 6),
/*image_hint=*/fuzztest::InRange<int>(0, WEBP_HINT_LAST - 1),
/*segments=*/fuzztest::InRange<int>(1, 4),
/*sns_strength=*/fuzztest::InRange<int>(0, 100),
/*filter_strength=*/fuzztest::InRange<int>(0, 100),
/*filter_sharpness=*/fuzztest::InRange<int>(0, 7),
/*filter_type=*/fuzztest::InRange<int>(0, 1),
/*autofilter=*/fuzztest::InRange<int>(0, 1),
/*alpha_compression=*/fuzztest::InRange<int>(0, 1),
/*alpha_filtering=*/fuzztest::InRange<int>(0, 2),
/*alpha_quality=*/fuzztest::InRange<int>(0, 100),
/*pass=*/fuzztest::InRange<int>(1, 10),
/*preprocessing=*/fuzztest::InRange<int>(0, 2),
/*partitions=*/fuzztest::InRange<int>(0, 3),
/*partition_limit=*/fuzztest::InRange<int>(0, 10),
/*emulate_jpeg_size=*/fuzztest::InRange<int>(0, 1),
/*thread_level=*/fuzztest::InRange<int>(0, 1),
/*low_memory=*/fuzztest::InRange<int>(0, 1),
/*near_lossless=*/fuzztest::InRange<int>(0, 5),
/*exact=*/fuzztest::InRange<int>(0, 1),
/*use_delta_palette=*/fuzztest::InRange<int>(0, 1),
/*use_sharp_yuv=*/fuzztest::InRange<int>(0, 1));
}
struct CropOrScaleParams {
bool alter_input;
bool crop_or_scale;
int width_ratio;
int height_ratio;
int left_ratio;
int top_ratio;
};
static inline auto ArbitraryCropOrScaleParams() {
return fuzztest::Map(
[](const std::optional<std::pair<int, int>>& width_height_ratio,
const std::optional<std::pair<int, int>>& left_top_ratio)
-> CropOrScaleParams {
CropOrScaleParams params;
params.alter_input = width_height_ratio.has_value();
if (params.alter_input) {
params.width_ratio = width_height_ratio->first;
params.height_ratio = width_height_ratio->second;
params.crop_or_scale = left_top_ratio.has_value();
if (params.crop_or_scale) {
params.left_ratio = left_top_ratio->first;
params.top_ratio = left_top_ratio->second;
}
}
return params;
},
fuzztest::OptionalOf(
fuzztest::PairOf(fuzztest::InRange(1, 8), fuzztest::InRange(1, 8))),
fuzztest::OptionalOf(
fuzztest::PairOf(fuzztest::InRange(1, 8), fuzztest::InRange(1, 8))));
}
// Crops or scales a picture according to the given params.
int CropOrScale(WebPPicture* pic, const CropOrScaleParams& params);
// Imposes a level of optimization among one of the kMaxOptimizationIndex+1
// possible values: OnlyC, ForceSlowSSSE3, NoSSE41, NoAVX, default.
static constexpr uint32_t kMaxOptimizationIndex = 4;
void SetOptimization(VP8CPUInfo default_VP8GetCPUInfo, uint32_t index);
//------------------------------------------------------------------------------
// See https://developers.google.com/speed/webp/docs/riff_container.
static constexpr size_t kMaxWebPFileSize = (1ull << 32) - 2; // 4 GiB - 2
std::vector<std::string> GetDictionaryFromFiles(
const std::vector<std::string_view>& file_paths);
// Checks whether the binary blob containing a JPEG or WebP is too big for the
// fuzzer.
bool IsImageTooBig(const uint8_t* data, size_t size);
} // namespace fuzz_utils
#endif // WEBP_TESTS_FUZZER_FUZZ_UTILS_H_
|
